A file of signals intelligence reports, messages, and correspondence issued by the Government Code and Cypher School and sent by the head ('C') of the Secret Intelligence Service (MI6) to the Prime Minister, Winston Churchill. This file includes the following reports on Southern Europe: that German Air Force (GAF) fighter units are to employ mortar aircraft/shells against Allied landings in the Nettuno area, on January 25; a 10th Army report for January 24, stating that the Allied penetration in the 5th Mountain Division area has now been blocked; a 10th Army report for January 25, noting Allied attacks being repulsed and several German counter-attacks; of the 26th Panzer Division being recalled from the front line of the 76th Corps, on January 24; 7 battle reports from various German divisions fighting in Italy, for January 23/24; of the Germans closing and mining 7 main airfields between Rome and the Garigliano front, on January 25, and that the mining is not recognisable from the air; of the results of an Allied air raid on the port of Savona, west of Genoa, on January 20; a situation report from the GAF South-east Command, describing air operations over the Balkans, on January 25; a 10th Army casualty return for the period of 1-10 January, in response to which the Prime Minister (PM) asks the Chief of the Imperial General Staff (CIGS) if the German figures compare with U.K. and U.S. losses for the same period; and on the results of Allied air raids against Skoplje and other parts of the Balkans, on January 24.